diff --git a/tools/releasetools/edify_generator.py b/tools/releasetools/edify_generator.py
index a9a9a0bd1..8964720c5 100644
--- a/tools/releasetools/edify_generator.py
+++ b/tools/releasetools/edify_generator.py
@@ -20,11 +20,15 @@ class EdifyGenerator(object):
   """Class to generate scripts in the 'edify' recovery script language
   used from donut onwards."""
 
-  def __init__(self, version, info):
+  def __init__(self, version, info, fstab=None):
     self.script = []
     self.mounts = set()
     self.version = version
     self.info = info
+    if fstab is None:
+      self.fstab = self.info.get("fstab", None)
+    else:
+      self.fstab = fstab
 
   def MakeTemporary(self):
     """Make a temporary script object whose commands can latter be
@@ -168,7 +172,7 @@ class EdifyGenerator(object):
       where option is optname[=optvalue]
       E.g. ext4=barrier=1,nodelalloc,errors=panic|f2fs=errors=recover
     """
-    fstab = self.info.get("fstab", None)
+    fstab = self.fstab
     if fstab:
       p = fstab[mount_point]
       mount_dict = {}
@@ -202,7 +206,7 @@ class EdifyGenerator(object):
     self.script.append('ui_print("%s");' % (message,))
 
   def TunePartition(self, partition, *options):
-    fstab = self.info.get("fstab", None)
+    fstab = self.fstab
     if fstab:
       p = fstab[partition]
       if p.fs_type not in ("ext2", "ext3", "ext4"):
@@ -216,7 +220,7 @@ class EdifyGenerator(object):
     """Format the given partition, specified by its mount point (eg,
     "/system")."""
 
-    fstab = self.info.get("fstab", None)
+    fstab = self.fstab
     if fstab:
       p = fstab[partition]
       self.script.append('format("%s", "%s", "%s", "%s", "%s");' %
@@ -226,7 +230,7 @@ class EdifyGenerator(object):
   def WipeBlockDevice(self, partition):
     if partition not in ("/system", "/vendor"):
       raise ValueError(("WipeBlockDevice doesn't work on %s\n") % (partition,))
-    fstab = self.info.get("fstab", None)
+    fstab = self.fstab
     size = self.info.get(partition.lstrip("/") + "_size", None)
     device = fstab[partition].device
 
@@ -271,7 +275,7 @@ class EdifyGenerator(object):
     """Write the given package file into the partition for the given
     mount point."""
 
-    fstab = self.info["fstab"]
+    fstab = self.fstab
     if fstab:
       p = fstab[mount_point]
       partition_type = common.PARTITION_TYPES[p.fs_type]
diff --git a/tools/releasetools/ota_from_target_files.py b/tools/releasetools/ota_from_target_files.py
index b0913e457..137285089 100755
--- a/tools/releasetools/ota_from_target_files.py
+++ b/tools/releasetools/ota_from_target_files.py
@@ -486,8 +486,9 @@ def GetImage(which, tmpdir, info_dict):
 
 def WriteFullOTAPackage(input_zip, output_zip):
   # TODO: how to determine this?  We don't know what version it will
-  # be installed on top of.  For now, we expect the API just won't
-  # change very often.
+  # be installed on top of. For now, we expect the API just won't
+  # change very often. Similarly for fstab, it might have changed
+  # in the target build.
   script = edify_generator.EdifyGenerator(3, OPTIONS.info_dict)
 
   oem_props = OPTIONS.info_dict.get("oem_fingerprint_properties")
@@ -727,8 +728,9 @@ def WriteBlockIncrementalOTAPackage(target_zip, source_zip, output_zip):
   if source_version == 0:
     print ("WARNING: generating edify script for a source that "
            "can't install it.")
-  script = edify_generator.EdifyGenerator(source_version,
-                                          OPTIONS.target_info_dict)
+  script = edify_generator.EdifyGenerator(
+      source_version, OPTIONS.target_info_dict,
+      fstab=OPTIONS.source_info_dict["fstab"])
 
   metadata = {
       "pre-device": GetBuildProp("ro.product.device",
@@ -794,7 +796,7 @@ def WriteBlockIncrementalOTAPackage(target_zip, source_zip, output_zip):
     vendor_diff = None
 
   oem_props = OPTIONS.target_info_dict.get("oem_fingerprint_properties")
-  recovery_mount_options = OPTIONS.target_info_dict.get(
+  recovery_mount_options = OPTIONS.source_info_dict.get(
       "recovery_mount_options")
   oem_dict = None
   if oem_props is not None and len(oem_props) > 0:
@@ -1115,11 +1117,13 @@ def WriteIncrementalOTAPackage(target_zip, source_zip, output_zip):
   if source_version == 0:
     print ("WARNING: generating edify script for a source that "
            "can't install it.")
-  script = edify_generator.EdifyGenerator(source_version,
-                                          OPTIONS.target_info_dict)
+  script = edify_generator.EdifyGenerator(
+      source_version, OPTIONS.target_info_dict,
+      fstab=OPTIONS.source_info_dict["fstab"])
 
   oem_props = OPTIONS.info_dict.get("oem_fingerprint_properties")
-  recovery_mount_options = OPTIONS.info_dict.get("recovery_mount_options")
+  recovery_mount_options = OPTIONS.source_info_dict.get(
+      "recovery_mount_options")
   oem_dict = None
   if oem_props is not None and len(oem_props) > 0:
     if OPTIONS.oem_source is None: